"A problem has occured with your display driver. Your system may not have enough resources to run the game at the selected settings. You can try using the same settings, or adjust to lower settings. Make sure you have the latest drivers for your video hardware, and try rebooting your system to help clear up any issues."

The game seems to be running fine for about twenty minutes before this happens. I don't know if it's overheating my computer or what, but I tried updating the drivers and my computer says they're already up to date. I tried restarting my computer too, and that doesn't work. I even lowered the detail settings to medium and unchecked triple buffering. I'm also running Steam in Administrator mode now.